18990740

素因数分解:

$2^2\times 5^1\times {\mathrm{613}}^1\times {\mathrm{1549}}^1$

素因数の和:2171

約数の個数: 24

約数和(自身を含む): 39971400

約数和(自身を除く): 20980660

約数列:

[1, 2, 4, 5, 10, 20, 613, 1226, 1549, 2452, 3065, 3098, 6130, 6196, 7745, 12260, 15490, 30980, 949537, 1899074, 3798148, 4747685, 9495370, 18990740]

約数ペア:

[(1, 18990740), (2, 9495370), (4, 4747685), (5, 3798148), (10, 1899074), (20, 949537), (613, 30980), (1226, 15490), (1549, 12260), (2452, 7745), (3065, 6196), (3098, 6130)]